Standard Specification for Refined Gold

Element (max.ppm)      
Au (% min.) 99.90% 99.95% 99.99%

Au+Cu (% min.)

 99.95% - -
Bi 10 10 5
Cu 800 400 100
Fe 20 20 10
Pb 250 150 10
Pd - - 10
Se - - 5
Te - - 5